Frequencies for first 10,000 rows of exercise variable in namcs2011 dataset :

   Exercise |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,015       90.15       90.15
        Yes |        985        9.85      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016